The weather outside was far from frightful in L.A. yesterday, but Will Ferrell made it into a winter wonderland as he launched his own coffee cup design as part of 7-Eleven’s Coffee Cup With A Cause program, with proceeds benefiting his Cancer for College charity. Samantha Harris also stopped by for a quick snowball fight!

Throughout 2010, 7-Eleven has partnered with entertainment and sports celebrities to design limited-edition 20-oz coffee cups to be sold in 7-Eleven stores nationwide. While 7-Eleven is providing a guaranteed $250,000 minimum donation to each charity, donations could increase depending on the number of cups sold. Consumers can drive donations through the purchase of cups.